... became leaders in a conspiracy against him (1174).[11] Henry, Duke of Anjou, the successor of Sigismud August on the throne of Poland and Lithuania, owed his election mainly to the efforts of Solomon Ashkenazi. Ivan Vassilyevich, too, had many and important relations with Jews, and his favorable attitude towards them is amply proved by the fact that his family physician was the Jew Leo (1490). Throughout his reign he maintained an uninterrupted friendship ... — The Haskalah Movement in Russia • Jacob S. Raisin